YAY another BC owner. Fantastic. ^^ Mud and I are constantly looking for more to learn, and currently are up to about 40 commands. Trick training keeps her mind busy, and although she wouldn't make much of an agility or frisbee dog, she could be a decent flyball dog. Unfortunately there isn't a flyball group here. Border Collies will help you become more creative as a trainer, definitely. Mud is a rescued BC, Zeke is my BC/ACD, and I'm currently training an 8-month-old BC for someone. They are wonderful to train and generally a lot of fun just to be with!
And they will certainly keep you in shape!
Welcome to the Academy, and enjoy the site!